api.cortexcloud.org

Name: api.cortexcloud.org
Price: 0.05 USDC
Availability: InStock

Classical, hybrid and real quantum solvers behind one pay-per-call API. Agents discover it via MCP and x402/MPP, estimate for free, and pay per call in USDC on Base. No API keys, no signup, no subscriptions.

OtherLiveeip155:8453Exactvia cdp

https://api.cortexcloud.org/v1/optimize

Calls · 30d

22→ 0%

This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 7 snapshots so far.

$9.61

Verified settled volume

186 settlements proven x402 by their on-chain EIP-3009 marker.

$0.050

Listed price

As published in the catalog. Always read the live 402 before paying.

Calls · 30d

Upstream's own call count for this endpoint, not ours.

Unique payers · 30d

Last called 2026-08-30 08:12Z

—

Upstream on-chain volume

Reported by the source catalog.

Paid to

0x5a0353bc9c75b893a9b5735d3e79f1bd988ea143

The wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.

Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Provider

The payTo wallet does not resolve to a registered ERC-8004 agent. That is not a verdict on the service — most of the catalog is unregistered.

Live 402 challenge

Captured by the enrichment pass, not read just now. Prices can change — always read the 402 the endpoint answers with.

{
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0x5a0353bc9c75b893a9b5735d3e79f1bd988ea143",
      "amount": "50000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 60
    }
  ],
  "resource": {
    "url": "https://api.cortexcloud.org/v1/optimize",
    "mimeType": "application/json",
    "description": "Solve a QUBO/Ising optimization problem. USDC on Base via x402; returns a job_id to poll."
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "body": {
            "mode": "auto",
            "problem": {
              "n": 4,
              "data": {
                "linear": [
                  1,
                  -2,
                  3,
                  -4
                ],
                "quadratic": {
                  "0,1": -1.5,
                  "1,2": 0.5,
                  "2,3": -2
                }
              },
              "problem_type": "qubo"
            }
          },
          "type": "http",
          "method": "GET",
          "bodyType": "json"
        },
        "output": {
          "type": "object",
          "format": "application/json",
          "example": {
            "mode": "auto",
            "poll": "/v1/jobs/3f5c2e6a-9a0b-4c8d-9e7f-1a2b3c4d5e6f",
            "job_id": "3f5c2e6a-9a0b-4c8d-9e7f-1a2b3c4d5e6f",
            "status": "queued",
            "price_usd": 0.05
          }
        }
      },
      "schema": {
        "properties": {
          "input": {
            "properties": {
              "body": {
                "type": "object",
                "required": [
                  "problem"
                ],
                "properties": {
                  "mode": {
                    "enum": [
                      "auto",
                      "classical",
                      "hybrid",
                      "quantum"
                    ],
                    "type": "string",
                    "default": "auto"
                  },
                  "problem": {
                    "type": "object",
                    "required": [
                      "n",
                      "data"
                    ],
                    "properties": {
                      "n": {
                        "type": "integer",
                        "maximum": 5000,
                        "minimum": 2
                      },
                      "data": {
                        "type": "object",
                        "properties": {
                          "linear": {
                            "type": "array",
                            "items": {
                              "type": "number"
                            }
                          },
                          "quadratic": {
                            "type": "object",
                            "description": "\"i,j\" -> coefficient",
                            "additionalProperties": {
                              "type": "number"
                            }
                          }
                        }
                      },
                      "problem_type": {
                        "enum": [
                          "qubo",
                          "ising"
                        ],
                        "type": "string",
                        "default": "qubo"
                      }
                    }
                  }
                }
              }
            }
          },
          "output": {
            "properties": {
              "example": {
                "mode": "auto",
                "poll": "/v1/jobs/3f5c2e6a-9a0b-4c8d-9e7f-1a2b3c4d5e6f",
                "job_id": "3f5c2e6a-9a0b-4c8d-9e7f-1a2b3c4d5e6f",
                "status": "queued",
                "price_usd": 0.05
              }
            }
          }
        }
      },
      "discoverable": true
    }
  },
  "x402Version": 2
}

Accepts

The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.

0.05USDC≈ $0.05 USD

on Base · exact scheme

Pay 0.05 USDC on Base to 0x5a03…ea143. The signed payment is good for 1 minute.

Paid to: 0x5a03…ea143
USD Coin contract: 0x8335…02913
Payment window: 1 minute
As published: 50000 smallest units

The catalog’s raw entry

[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x5a0353bc9c75b893a9b5735d3e79f1bd988ea143",
    "amount": "50000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 60
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "body": {
          "mode": "auto",
          "problem": {
            "n": 4,
            "data": {
              "linear": [
                1,
                -2,
                3,
                -4
              ],
              "quadratic": {
                "0,1": -1.5,
                "1,2": 0.5,
                "2,3": -2
              }
            },
            "problem_type": "qubo"
          }
        },
        "type": "http",
        "method": "POST",
        "bodyType": "json"
      },
      "output": {
        "type": "object",
        "format": "application/json",
        "example": {
          "mode": "auto",
          "poll": "/v1/jobs/3f5c2e6a-9a0b-4c8d-9e7f-1a2b3c4d5e6f",
          "job_id": "3f5c2e6a-9a0b-4c8d-9e7f-1a2b3c4d5e6f",
          "status": "queued",
          "price_usd": 0.05
        }
      }
    },
    "schema": {
      "properties": {
        "input": {
          "properties": {
            "body": {
              "type": "object",
              "required": [
                "problem"
              ],
              "properties": {
                "mode": {
                  "enum": [
                    "auto",
                    "classical",
                    "hybrid",
                    "quantum"
                  ],
                  "type": "string",
                  "default": "auto"
                },
                "problem": {
                  "type": "object",
                  "required": [
                    "n",
                    "data"
                  ],
                  "properties": {
                    "n": {
                      "type": "integer",
                      "maximum": 5000,
                      "minimum": 2
                    },
                    "data": {
                      "type": "object",
                      "properties": {
                        "linear": {
                          "type": "array",
                          "items": {
                            "type": "number"
                          }
                        },
                        "quadratic": {
                          "type": "object",
                          "description": "\"i,j\" -> coefficient",
                          "additionalProperties": {
                            "type": "number"
                          }
                        }
                      }
                    },
                    "problem_type": {
                      "enum": [
                        "qubo",
                        "ising"
                      ],
                      "type": "string",
                      "default": "qubo"
                    }
                  }
                }
              }
            }
          }
        },
        "output": {
          "properties": {
            "example": {
              "mode": "auto",
              "poll": "/v1/jobs/3f5c2e6a-9a0b-4c8d-9e7f-1a2b3c4d5e6f",
              "job_id": "3f5c2e6a-9a0b-4c8d-9e7f-1a2b3c4d5e6f",
              "status": "queued",
              "price_usd": 0.05
            }
          }
        }
      }
    },
    "discoverable": true
  }
}

Provenance

Seen in the source catalog: 2026-08-30 08:12Z
Last indexed by Roundhouse: 2026-09-02 00:20Z
Last enriched (probe, favicon, geo): 2026-09-23 16:45Z
x402 version: 2
Max timeout: 60s
Liveness probe: HTTP 402

Report

Hand this page to an agent

Copy the prompt and paste it into Claude, an MCP client or your own agent — it will vet this service and call it over the free read API. No key, no account.

GET api.roundhouseai.io/v0/endpoints

This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 7 snapshots so far. Verified volume counts only settlements with an on-chain EIP-3009 marker.

Open skill.md

Show the prompt

Using Roundhouse, look up the x402 service api.cortexcloud.org and tell me whether it is
worth paying: what a call costs, whether the endpoint answered when last probed, and what
its payment record actually shows.

curl -s 'https://api.roundhouseai.io/v0/endpoints?q=api.cortexcloud.org'
curl -s 'https://api.roundhouseai.io/v0/merchants/<the payTo wallet returned above>'

Then call it: read the price from the live 402 at https://api.cortexcloud.org/v1/optimize, never from
a cached figure, and pay with an x402 client.

The /v0 API needs an API key (`authorization: Bearer rh_live_…`) on everything except
/v0/unified* and /v0/endpoints. Mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402,
or use an organization key from https://roundhouseai.io/dashboard/team.

If you do not have Roundhouse tools or skills installed, read
https://roundhouseai.io/skill.md first — it is the whole procedure.